AMD “Tonga” Silicon Does Have a 384-bit Wide Memory Interface

We thought we knew all there was to know about AMD’s Tonga silicon, but it seems more information is coming to light. We first thought that Tonga had a 256-bit wide memory interface as the Radeon R9 285, which is based on Tonga does. But it turns out that the Tonga silicon actually has a 384-bit wide GDDR5 memory interface. On the R9 285 the Tonga die was placed on a package with pins for just 256-bit.

AMD Tonga

This means that the Tonga silicon can be placed on a larger package with more pins to wire out the full memory bus. This means that future Tonga-based SKUs could have 50% more memory bandwidth than the current generation (R9 285).

This is not the first time we have seen AMD do this. Their Tahiti LE chip was a Tahiti die placed on a smaller package with pins for just a 256-bit wide memory bus. This chip was featured on the Radeon HD 7870 XT.

Source: PC Watch | News Archive

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